Nuggets from "Whatever Happened to Heaven?" by Dave Hunt
Scripture is very clear that immortality will come both to the living believers and to those who have previously died only at the resurrection, an event that will be initiated by God Himself, not by men who have attained to some special spiritual state. This false teaching should be finally laid to rest by the following scripture, which clearly states when bodily immortality will be received:
"Now this I say, brethren, that flesh and blood cannot inherit the kingdom of God; neither doth corruption inherit incorruption. Behold, I show you a mystery: We shall not all sleep [die], but we shall all be changed, in a moment, in the twinkling of an eye, at the last trump for the trumpet shall sound, and the dead shall be raised incorruptible, and we [the living at the time] shall be changed. For this corruptible [body] must put on incorruption [in order to be in the millennial kingdom], and this mortal must put on immortality (1 Corinthians:15:50-53).